Abstract: A stereoscopic display which enables plural persons to simultaneously observe stereoscopic images includes a color liquid crystal plate for displaying stereo-pairs composed of left and right eye perspectives in time-interlaced manner, a monochrome TV display disposed behind the color liquid crystal plate for displaying binary and inverted binary images of half face of each observer so as to be synchronized with the time-interlaced display of the color liquid crystal plate, and a large convex lens disposed between the color liquid crystal plate and the monochrome TV display so as to focus the observers' optical images on the screen of the monochrome TV display in geometrical agreement with the observers' face images displayed thereby. And an infrared TV camera is disposed so as to take observers' images by way of the large convex lens and input observers' face images to the monochrome TV display.

Abstract: A stereoscopic image display apparatus including a liquid crystal display of light transmission type for displaying right-eye and left-eye target images, a pair of CRTs for displaying illuminating graphic patterns for illuminating the display from the back surface, and a Fresnel lens 11 arranged before the CRTs to show the viewer given displayed portions on the display screens of these CRTs in an enlarged scale. A first graphic pattern polarized in the X direction is displayed at a first position, which corresponds to the right eye of the viewer, on the display screen of the first CRT. A second graphic pattern polarized in the Y direction perpendicular to the X direction is displayed at a second position, which corresponds to the left eye of the viewer, on the second CRT. The display screen of the liquid crystal display is illuminated from the behind by the light from the first and second graphic patterns displayed on the CRTs, respectively.

Abstract: A stereoscopic-image game playing apparatus displays a screen image for right eye and a screen image for left eye on LCD 105, outputs images of the player obtained by cameras 103a and 103b to the receiving side, and displays images corresponding to the right half face and the left half face of the player based on the player's images on LCD 107. The images displayed on the LCD 107 are used as figures for selectively introducing lights from the screen images on the LCD 105, by lens 106, to the right and left eyes of the player. This enables stereoscopic vision without glasses for separating images respectively for the player's right and left eyes, and allows the player to move from the initial position.

Abstract: A handy blood glucose measurement apparatus irradiates the retina of the eye of the subject with light emitted from light-emitting elements having two different wavelengths, with the light of one wavelength serving as reference light and the light of the other wavelength serving as measurement light. The intensity of the reference light and of the measurement light is obtained and the blood glucose value of the subject is found based upon the difference between these two reflected-light intensities. By focusing his or her eye on a symbol or figure displayed on a display panel in the apparatus, the subject is capable of focusing the light emitted by the light-emitting elements on the retina of the eye in reliable fashion.

Abstract: A stereoscopic image communication apparatus displays a screen image for right eye and a screen image for left eye on LCD 105, outputs images of the viewer obtained by cameras 103 to the receiving side, and displays images corresponding to the right half face and the left half face of the viewer based on the viewer's images on LCD 107. The images displayed on the LCD 107 are used as figures for selectively introducing lights from the screen images on the LCD 105, by lens 106, to the right and left eyes of the viewer. This enables stereoscopic vision without glasses for separating images respectively for the viewer's right and left eyes, and allows the viewer to move from the initial position.

Abstract: Screen images for the right eye are displayed upside down on an image display device 10a, and screen images for the left eye are displayed inverted upside down and right-to-left on an image display device 10b. Light of the screen images for the right eye and for the left eye are polarized so that polarization directions of the light for the right eye and for the left eye are perpendicular to each other. Right half images of viewers' faces, picked up by an image sensing device 14, are displayed on liquid crystal display elements 11. The displayed images functions as light transmission images, and by observing them through a lens 11 having directivity characteristics, the screen images for the right eye and screen images for the left eye of images combined by a half mirror 15 are respectively seen by the right and the left eyes of the viewers.

Abstract: A stereoscopic television which enables plural observers to simultaneously observe a stereoscopic images includes a color liquid-crystal plate, a monochrome TV display disposed behind the liquid-crystal plate, and a large format lens disposed between the color liquid-crystal plate and the monochrome TV display so as to focuss the observer's image on the screen of the TV display. The color liquid-crystal plate alternately displays stereo-pairs composed of left and right eye perspectives, and the monochrome TV display alternately displays inverted binary images of half face of each oberver. The large format lens distrubutes light emitted from the inverted binary images of half face of each observer to the left and right eyes of each observer through the color liquid-crystal plate, whereby the left and right eye perspectives of the stereo-pairs displayed by the liquid-crystal plate respectively reach the left and right eyes of each observer.

Abstract: An ocular fundus camera apparatus includes an ocular fundus camera having an optical lens that transfers first and second image light components which have a parallax therebetween and which can be separated from each other, a memory for storing a predetermined coefficient a based on the shape of the optical lens, and a CCD for converting the first and second image light components into first and second image signals (A, B). The ocular fundus camera apparatus generates first and second image data (L, R) by performing proportional distribution of the first and second image signals in accordance with the predetermined coefficient.

Abstract: In an apparatus for displaying a three-dimensional image, an image display and a polarizing filter having an axis of easy transmission in a predetermined direction or an optically-active film having an optically-active portion at a predetermined position are combined together in a predetermined positional relationship, thereby easily displaying an image on the image display when a flat original image is prepared for forming the three-dimensional image and simplifying the structure of the apparatus with a reduced manufacturing cost.

Abstract: A depth sampling three-dimensional image display apparatus is capable of displaying a three-dimensional image without use of glasses. The apparatus includes a collimated light projecting device for projecting collimated light and an object of observation which passes substantially all components of the collimated light without inducing refraction or diffraction, and which has written therein information without inducing refraction or diffraction of the collimated light representative of a three-dimensional image. The apparatus further includes a large-diameter convex condenser for concentrating the light passed through the object of observation, a spatial filter which obstructs passage of light only in an area including the optical axis and the vicinity thereof to eliminate the straight-flow component of the light introduced via the large-diameter convex condenser, and a large-diameter convex imaging lens for focusing the light passed through the spatial filter to form a three-dimensional image.

Abstract: An endoscope apparatus has an endoscope having an image guide (103) for guiding first and second image light components which have a parallax and can be separated from each other, a memory for storing a predetermined coefficient (a) on the basis of the shape, length, and the like of the image guide, and CCDs for converting the first and second image light components into first and second image signals (A, B). The apparatus performs image processing for generating first and second image data (L, R) by performing proportional distribution processing of the first and second image signals in accordance with the predetermined coefficient.

Abstract: Screen images for the right eye and for the left eye are displayed upside down on the image display devices 10a and 10b, respectively, and images of right half and left half faces of the viewers picked-up by image sensing devices 14a and 14b are displayed on the spatial modulation elements 11a and 11b. By seeing the screen images transmitted through the images of the right half and the left half faces, which are light transmission images, on the spatial modulation elements 11a and 11b, and through lenses 11a and 11b, having directivities, the right eyes and the left eyes of the viewers can respectively see the screen images for the right eyes and for the left eyes, which are combined by a half mirror 15.

Abstract: A space modulation device 10 displays an image for right eye and an image for left eye. An observer image display device 12 displays an image of a half surface of an observer's face obtained by an imaging device 14 and a negative-positive reversed image of the image of the half surface of the face. A lens 11 allows the image for right eye or the image for left eye to be observed to the right eye or the left eye of the observer using the image of the half surface or the negative-positive reversed image thereof as an illumination for the spatial modulation device 10 from the back thereof.

Abstract: An autostereoscopic system has a taking section for taking an image of a predetermined reference plane and outputting an image signal composed of a plurality of parallax images based on the taken image of the predetermined reference plane, and a playback section for reproducing a 3-D image based on the image signal output by the taking section. The taking section is composed of TV cameras, each having a convex lens and an image pickup screen, which are arranged in the horizontal direction, and the playback section is composed of image output screens arranged in the horizontal direction for outputting inverted parallax images of those at the image pickup screen, a large Fresnel convex lens disposed in front of the image output screens, and convex lenses, each being disposed between each of the image output screens and the large Fresnel convex lens, for projecting the inverted parallax images on or along the effective lens plane of the large Fresnel convex lens.

Abstract: A three-dimensional photographing and three-dimensional playback device by spatial time-sharing method has a taking section having a convex lens, an image pickup screen spaced from the convex lens at a distance equal to the focal length of the convex lens, and a pin hole movable on a surface of the convex lens, and a playback section having a cylindrical lens, an image output screen spaced from the cylindrical lens at a distance equal to the focal length of the cylindrical lens, and a vertical slit movable on a surface of the cylindrical lens. The pin hole in the taking section and the vertical slit in the playback section are scanned in synchronization whereby any image can be photographed and played back three-dimensionally without using any special instrument such as polarized glasses, etc.